From 8ac6c7a54ed1b98d142dce24b11c6de6a1e239a5 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Tue, 22 Oct 2024 10:36:11 +0000
Subject: [PATCH] 修改4g拨号为QMI,需要在系统里后台执行quectel-CM

---
 kernel/net/caif/caif_usb.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/kernel/net/caif/caif_usb.c b/kernel/net/caif/caif_usb.c
index b02e129..24488a4 100644
--- a/kernel/net/caif/caif_usb.c
+++ b/kernel/net/caif/caif_usb.c
@@ -134,6 +134,9 @@
 	struct usb_device *usbdev;
 	int res;
 
+	if (what == NETDEV_UNREGISTER && dev->reg_state >= NETREG_UNREGISTERED)
+		return 0;
+
 	/* Check whether we have a NCM device, and find its VID/PID. */
 	if (!(dev->dev.parent && dev->dev.parent->driver &&
 	      strcmp(dev->dev.parent->driver->name, "cdc_ncm") == 0))

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